Dental plugger.



J. G. BETTS.

DENTAL PLUGGER.

APPLICATION FILED APR. 18, 1907.

Patented 00b. 13, 1908.

- WITNESSES Y E N R 0 T T A 0., wAsumaroN. 12 c.

G. BETTS, OF PHILADELPHIA, PENNSYLVANIA.

JOHN

DENTAL PLUGGEB.

No. 901,276. Specification of Letters Patent.

Application filed April 18, 1907. Serial No. 368,839.

Patented Oct. 13, 1908.

WVithin the upper compartment projects the tool holder F of anyparticular form of implement which at the time is being used, andthrough this tool holder is threaded the screw G, the inner end of whichterminates in a pin 9 projecting into the groove of the cam E, so thatwhen said cam is revolved this pin will be reciprocated back and forth,thus reciprocating the tool holder F, and consequently the implementcarried thereby or formed therewith.

The cam has formed thereon the spindle H, which is adapted to engage thechuck of a flexible shaft whereby it will be rotated, as is wellunderstood in dentistry.

In Figs. 1, 2 and 5 I have shown a scraper formed with or attached tothe tool holder, and when this implement is used the operation of myimprovement will be as follows The cam being set in motion bytheordinary dental engine, the scraper will be reciprocated back andforth at a high rate of speed, when the operator has only to in sert thescraper in the mouth of the patient and bring it into contact with thesurfaces to be scraped, when this constant reciprocation thereof willaccomplish the work, en tirely relieving the operator of the awkwardmovement of scraping, and permitting him to give his entire attention tothe application of the tool to the proper surfaces, the work being doneby the dental engine.

Where a plugger is used, as shown at J, in Fig. 6, the bringing of theplugging implement into contact with the surfaces to be hammered inconjunction with the constant reciprocation of the implement willproduce the blow efli'ect necessary to proper plugging, so that theoperator has only to remove and replace the plugging point from time totime to proceed with the work.

In Fig. 8 I have shown a still further modification of my improvement inwhich the tool holder at is fitted to slide in the eX- tension 6 andprevented from removal by the pin d. The spring 6 forces the tool holderin one direction while the plunger f actuated by the cam E striking thetool holder will impart the blow to the plugging implement.

g is a collar secured to the tool holder by which the operator can slidethe tool holder out of the field of action of said plunger,

To all whom it may concern:

Be it known that I, JOHN C. Burns, a citizen of the United States,residing at Philadelphia, county of Philadelphia, and State ofPennsylvania, have invented certain new and useful Improvements inDental Pluggers, of which the following is a specification.

My invention relates to a new and useful improvement in dental pluggers,and has for its object to provide an exceedingly simple and effectivedevice of this description which may be utilized for operating theplugger tools which are now mostly used by hand, and in addition toplugging tools, scrapers and saws may be advantageously operated by thesame mechanism, thus greatly facilitating the work of a dentist.

With these ends in View, this invention consists in the details ofconstruction and combination of elements hereinafter set forth and thenspecifically designated by the claims.

In order that those skilled in the art to which this inventionappertains may understand how to make and use the same, I will describeits construction in detail, referring by letter to the accompanyingdrawings forming a part of this specification, in which- Figure 1 is aside view of the preferred form of my improved tool. Fig. 2, alongitudinal section thereof showing the interior working parts. Fig. 3,details of the several pieces of which the casing is composed. Fig. a, adetail of the operating cam and its spindle. Fig. 5, a similar View ofthe scraping tool. Fig. 6, a similar view of a plugging tool. Fig. 7 anenlarged view of the cam screw showin a roll upon the end thereof forreducing friction between said screw and cam. Fig. 8, is a section of astill further modification of my invention.

In carrying out my invention as embodied in Figs. from 1 to 8, Arepresents the body of the casing, which has threaded therein the barrelor sleeve C, while in the opposite side of said body is threaded thehandle D. The interior casing is divided by a slotted mid wall into twocompartments, as clearly shown in Fig. 2, the lower compartment beingadapted to receive and house the cam E, which is held againstlongitudinal movement by the inner end of the handle D.

thus stopping the movements of the plunger and facilitating the pickingup of the filling material.

Having fully described my invention, what I claim as new and useful, is

1. In a dental tool, a casing formed with two compartments tured midwall, the compartments having relatively opposite open ends acylindrical. bodydisposed in one compartment, said body being formedwith a cam groove, a handle secured to said casing and to hold said bodyagainst longitudinal movement, said body carrying a spindle forattachment to an engine shaft, a tool holder disposed in the othercompartment for longitudinal reciprocating movement and a pin projectinglaterally from the inner end of said holder through the opening in themid wall, said pin having its end engaged in the cam groove.

2. In a dental tool, a casing formed with two compartments, separated byan aperseparated by an aper-' tured mid Wall, the compartments havingrelatively opposite open ends, a tubular handle engaged in the open endof one compartment, a sleeve engaged in the open end of theother'compartment, a cylindrical body a pin projecting laterally fromthe inner end of the tool holder through the aperture in the mid Walland into the cam groove of said cylindrical body.

In testimony whereof, I have hereunto aflixed my signature in thepresence of two subscribing witnesses.

JOHN C. BETTS.

lVitnesses:

JOSEPH C. SMITH, S. M. GALLAGHER.

